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Wear Debris Mobility, Aligned Surface Roughness, and the Low Wear Behavior of Filled Polytetrafluoroethylene
University of Florida, USA.ORCID iD: 0000-0002-2473-9171
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2015 (English)In: Tribology letters, ISSN 1023-8883, E-ISSN 1573-2711, Vol. 60, no 1, article id 2Article in journal (Refereed) Published
Abstract [en]

PTFE/α-alumina composites are well known to exhibit very low wear rates compared to unfilled PTFE and various other PTFE-matrix composites. The improved wear life of these composites is attributed in part to the formation of a uniform protective transfer film on the metal countersurface. It is postulated that the retention of transferred material and the recirculation of third bodies between the transfer film and running surface of the polymer composite are necessary for the maintenance of low wear within this tribological system. The accumulation of these third bodies was observed in reciprocating sliding tests on countersamples prescribed with aligned roughness. Wear performance of the polymer composite was tested as a function of the between the sliding direction and the aligned roughness of the countersample, ranging from parallel to perpendicular to the sliding direction. The wear rate of roughness oriented with the sliding direction was 300 times higher than roughness perpendicular to the sliding direction, revealing the importance of surface morphology and third body retention.

Place, publisher, year, edition, pages
Springer New York LLC , 2015. Vol. 60, no 1, article id 2
Keywords [en]
Alumina, Polytetrafluoroethylene, PTFE, Third body, Transfer film, Tribochemistry, Wear, Aluminum oxide, Composite materials, Morphology, Polytetrafluoroethylenes, Surface morphology, Wear of materials, Matrix composite, Polymer composite, Reciprocating sliding, Sliding direction, Tribo-chemistry, Tribological systems, Surface roughness
National Category
Tribology (Interacting Surfaces including Friction, Lubrication and Wear)
Identifiers
URN: urn:nbn:se:ri:diva-56338DOI: 10.1007/s11249-015-0581-7Scopus ID: 2-s2.0-84940905346OAI: oai:DiVA.org:ri-56338DiVA, id: diva2:1591299
Available from: 2021-09-06 Created: 2021-09-06 Last updated: 2023-05-23Bibliographically approved

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Harris, Kathryn L

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